In conclusion … If you want to use Flex Disk Groups, be sure to first create the File Group and then create your databases.

I did some testing moving datafiles from one Disk Group to another, but until then I have not figured out if there is a way to move an ASM File to another File Group. The documentation regarding the Flex Disk Group is still very precarious.

I’ll do some more articles about this feature of Oracle 12cR2, so stay tuned.